Condenser



H. L. SKLAR Sept. 11, 1934.

CONDENSER Filed Sept. 30. 1952 iNyEN-roR Her ee Patented Sept. 11, 1934 UNITED STATES PATENT @FICE Micamold Radio Corporation,

Brooklyn, N. Y.,

a corporation oi New York Application September 30, 1932, Serial No. 635,6li

5 lairns.

This invention relates to condensers of the type wherein a dry electrolytic nlm is maintained on the surface of armatures or electrodes such as aluminum and employing an electrolyte in the form of a heavy liquid.

l'. have found that an improved condenser of this type may be made employing an ethanol substituted derivative of ammonia-monoethanolamine in combination with boric acid hexamethylenetetramine, and glycol or similar substance, that is, compounds having adjacent pairs of carbon atoms, together with the addition or a protective colloid such as starch or bentonite.

As an example of the electrolyte I mix the following ingredients in the proportions indicated:

This mixture is heated to boiling and the boiling is continued to a temperature between 125 degrees and 13@ degrees C. in order to drive on part or the water originally present and that liberated by the reaction wit the electrolyte. When this temperature is reached l'. suhmerge the electrclytic condenser rolls of the type well known to the art in the prepared electrolyte. lThe rolled condenser mentioned is formed from an aluminum anode, the surface of which ls covered with gauze. Under this is placed a raw aluminum cathode cov-i ered with gauze and the two are rolled up. lt is such a condenser roll which is dipped into the electrolyte and impregnated therewith. The conn denser is then :formed in a manner well lniown to the art, that is hy applying a high voltage to the condenser in series with a high resistance.

although l have specincally described an electrolyte containing the parts b y weight mentioned above, it ls to he understood 'that l am not con=l nnen to such proportions, hut may yar-y the ingre diente to obtain dlnerent characteristics in the condenser. ltis also to be noted that although l have described speclr'lcally the use ci' monoethan= olamine, l have round that this material may he employed with triethanolamine or other highly substituted alcoholae as part ci the electrolyte electrolyte or higher viscosity.

.in combination with hexamethylenetetrarnine may be used with other suitable weak acids. Among such suitable acids are glyco boric and glycero boric acids.

It is to be noted that after prolonged use for impregnation if the electrolyte loses elciency through the loss of too much Water, water may be added to the electrolyte to bring it back to its original consistency.

I have found that condensers so prepared and formed give a large capacity per square inch and an extremely low power factor.

an improved shelf life characteristic. I have found also that the condenser described above` is highly eineient at low temperature.

A preferred form of condenser employing the electrolyte above described is shown inthe ac-= companying drawing wherein Fig. l is a perspec tive View of the condenser partially unrolled, and Fig. 2 is an enlarged cross-sectional View talren through the condenser along the line 2 2 of Fig. l.4

In the drawing, the numeral l designates one electrode with its terminal 2. The other elec-1 trode is designated by 3 with its terminal shown at a. Between the electrodes are layers of gauze 5 and 6 impregnated with the electrolyte.

What claim is:

l. An electrolytic condenser of the class described having an armature ot the nlm-forming type and an electrolyte characterized by the presence of an ethanolarnmoniurn ion, hexamethylenetetramine, a weak acid and a polyhydroxy alcohol.

2. An electrolytic condenser of the class described having an armature of the nlm-forming type and an electrolyte characterized by the presence of a monoethanolamine, hexainethylenetetramine, a weak acid and a polyhydrony ala;

cchol.

3. An electrolytic condenser or" the class de= scribed having an armature of the nlrn=forming type and an electrolyte characterized by the pres They also have Sil) , lill) ence of an ethanolammonium ion, hesarnethylflle venenetramine, boric acid and a polyhydroxy alcohol.

' 4. An velectrolytic condenserrof the class described having an armature of the lm-forming 'type and an electrolyte characterized by the presence of an ethanolammonium ion, hexamethylenetetramine. a weak acid and glycol.

HERMAN LEE SKLAR. 

